Improvement in combined concrete and wood pavements



` MARK FLA-NlGAN- Ul'mpir'ovement n Combined Concrete and WoodPavements.

Patented M,a y^30,18 711.

e N` .UNITED STATES yPATENT Grrlcn.,

- MARK FLANIGAN, `or DETROIT, MICHIGAN, AssIGNoR To HIMsELr AND HARVEY` WINSER, OF SAME PLAGE.

e IMPROVEMENT IN COMBINED CONCRETE AND WOOD PAVEIVIENTS.l

` Specification forming part of Letters Patent No. 115,457, dated May 30, 1871.

To whom t may concern: l

Be it known that I, MARKFLANIGAN, of Detroit, in the county of Wayne and State of A Michigan, have invented a new and useful Improvement in Combined Wood and Concrete Pavement; and I do declarethat the follow- Ing is a true and accuratedescriptiou thereof,

" i reference being had to the accompanying drawin g and to the letters of reference marked thereon and being a part of this specificatiomin t whicht liigurel is a plan View, and Fig. 2 1s avertical section on the line x,"Fig. l.

Like Aletters refer to like parts in each figure. The nature of 'this invention relates to an to be profitably sawn into lumber, to b e utilized without other preparation than that of being sawn into proper and uniform lengths. The invention consists in covering a properlyprepared road-bedwithacompositionof broken stone, gravel, or sand, Trinidad asphalt, and

` coal-tar, or refuse coal-oil, mixed in such proportions as will form a substance which, when Q spread on a roadbed, which1 maybe covered with` boards, pianlnstones, or any smooth or uneven surface,ifdesired, and thoroughlycompacted together, will make-adurable road-bed orfoundation upon which toplace the blocks.`

Theseblocksl may be cut from anyV small timber, although cedar, chestnut,"tamarac, or

" i spruce is preferred, the onlygpreparation nec-` essary being toV remove theibark and saw the timber into blocks of equal lengths. These are placed on end upon the road-bed, prepared as above; Without reference as to order or size, care being taken to set them in such a manner as to leave a space around "each block, which `is to be nlled with a concrete or compound (wherein Trinidad asphalt forms a component part) flush with the tops of the blocks. This compound should be so treated in its preparation that it will readily set7 or harden and hold the blocks rigidly in place. i

In the accox'npanying draWing,`A represents the cylindricalshaped blocks, set upon the composite bed B, and held rigidly in place by the composite filling C.

In a pavement thus constructed agreat saving can be hadliu the cost by utilizing a class of small timber which is usually considered only iit for fire-wood, While it Will form a perfeet Water-shed to the street and a surface of great durability. Y

I am aware that concrete or asphalt pavements are `in use, as well as those composed partly of concrete and partly of Wood. Ido

,not claim any part in the invention of those pavements; but j That I claim as my invention, and desire to A pavement composed of small cylindrically-shaped blocks A, placed upon a composite bed, B, and held in place by the composite illing C, substantially as set forth.

'MARK -FLANIGAN.

Witnesses:

Tnos. S. SPRAGUE, OHAs. J. HUNT. 

